:root {
  --paper: #FFFFFF;
  --paper-soft: #F5F5F7;
  --ink: #1D1D1F;
  --ink-soft: #6E6E73;
  --ink-mute: #86868B;
  --terracotta: #0071E3;
  --gold: #6E6E73;
  --olive: #F5F5F7;
  --line: rgba(0, 0, 0, 0.08);
  --line-soft: rgba(0, 0, 0, 0.05);
  --display: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'Segoe UI', sans-serif;
  --sans: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'SF Pro Text', 'Segoe UI', sans-serif;
  --mono: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'SF Pro Text', 'Segoe UI', sans-serif;
  --card-radius: 34px;
}

body, button, input, textarea, select { font-family: var(--display); }
body { background: var(--paper); color: var(--ink); }
main { overflow: hidden; }
section { position: relative; }
.reveal { opacity: 1 !important; transform: none !important; }
h1, h2, h3 { font-family: var(--display); }
h1 em, h2 em { color: var(--terracotta); font-style: normal; font-weight: 400; }

.echo-header {
  position: sticky;
  top: 0;
  z-index: 80;
  min-height: 76px;
  padding: 14px clamp(20px, 4vw, 64px);
  display: grid;
  grid-template-columns: 1fr auto auto;
  gap: 28px;
  align-items: center;
  background: color-mix(in srgb, var(--paper) 92%, transparent);
  border-bottom: 1px solid var(--line-soft);
  backdrop-filter: blur(14px);
}

.echo-brand { display: inline-flex; flex-direction: column; align-items: flex-start; gap: 1px; width: fit-content; }
.echo-brand-cn { font-family: var(--display); font-size: 1.65rem; font-weight: 600; letter-spacing: .08em; }
.echo-brand-ai { font-family: var(--mono); font-size: .68rem; letter-spacing: .18em; color: var(--terracotta); }
.echo-header-link { font-size: .86rem; color: var(--ink-soft); border-bottom: 1px solid var(--line); padding-bottom: 3px; }

.echo-button {
  min-height: 50px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 13px 25px;
  background: var(--terracotta);
  color: #fffaf2;
  font-size: .92rem;
  letter-spacing: .06em;
  border: 1px solid var(--terracotta);
  transition: transform .25s ease, background .25s ease;
}
.echo-button:hover { transform: translateY(-2px); background: #7F493C; }
.echo-button-small { min-height: 44px; padding: 10px 18px; font-size: .82rem; }
.echo-button-light { background: var(--paper); color: var(--ink); border-color: var(--paper); }
.echo-text-link { display: inline-flex; gap: 12px; align-items: center; font-size: .9rem; color: var(--ink); border-bottom: 1px solid var(--ink); padding-bottom: 5px; width: fit-content; }

.echo-kicker, .echo-index {
  font-family: var(--mono);
  font-size: .72rem;
  letter-spacing: .18em;
  color: var(--terracotta);
  text-transform: uppercase;
}
.echo-index { display: flex; align-items: center; gap: 12px; margin-bottom: 24px; }
.echo-index::before { content: ''; width: 32px; height: 1px; background: var(--gold); }

.echo-hero {
  min-height: calc(100svh - 76px);
  display: grid;
  grid-template-columns: minmax(0, 1.04fr) minmax(360px, .96fr);
  border-bottom: 1px solid var(--line);
}
.echo-hero-copy { padding: clamp(72px, 10vw, 150px) clamp(28px, 7vw, 110px); display: flex; flex-direction: column; justify-content: center; }
.echo-hero h1 { font-size: clamp(3rem, 5.6vw, 6.8rem); line-height: 1.12; letter-spacing: -.055em; max-width: 920px; margin: 28px 0 32px; }
.echo-lede { max-width: 620px; font-size: clamp(1.08rem, 1.5vw, 1.34rem); line-height: 1.9; color: var(--ink-soft); }
.echo-hero-promise { margin: -10px 0 16px; font-family: var(--display); font-size: clamp(1.2rem, 1.8vw, 1.65rem); color: var(--terracotta); }
.echo-actions { display: flex; align-items: center; gap: 30px; flex-wrap: wrap; margin-top: 24px; }
.echo-hero-note { margin-top: 54px; padding-top: 20px; border-top: 1px solid var(--line); display: flex; flex-wrap: wrap; gap: 12px 30px; color: var(--ink-mute); font-size: .78rem; }
.echo-hero-note span::before { content: '◆'; margin-right: 8px; color: var(--gold); font-size: .6rem; }
.echo-hero-visual { margin: 0; min-height: 680px; position: relative; background: var(--paper-soft); overflow: hidden; }
.echo-hero-visual img { width: 100%; height: 100%; object-fit: cover; }
.echo-hero-visual figcaption { position: absolute; left: 24px; right: 24px; bottom: 20px; color: rgba(255,255,255,.92); font-size: .76rem; letter-spacing: .05em; text-shadow: 0 1px 12px rgba(0,0,0,.35); }

.echo-questions, .echo-outcomes, .echo-paths, .echo-process, .echo-faq { padding: clamp(84px, 11vw, 160px) var(--pad-x); }
.echo-section-head { display: grid; grid-template-columns: .6fr 1.4fr; gap: 40px; align-items: start; margin-bottom: clamp(50px, 7vw, 96px); }
.echo-section-head .echo-index { margin: 10px 0 0; }
.echo-section-head h2 { font-size: clamp(2.45rem, 4.7vw, 5.4rem); line-height: 1.18; letter-spacing: -.045em; }
.echo-question-list { border-top: 1px solid var(--line); }
.echo-question { display: grid; grid-template-columns: 90px 1fr; padding: clamp(30px, 4vw, 54px) 0; border-bottom: 1px solid var(--line); }
.echo-question > span { font-family: var(--mono); color: var(--gold); }
.echo-question p { margin: 0; font-family: var(--display); font-size: clamp(1.55rem, 3vw, 3.4rem); line-height: 1.36; color: var(--ink); }

.echo-founder { padding: clamp(90px, 12vw, 180px) var(--pad-x); background: var(--terracotta); color: #fff9ef; text-align: center; }
.echo-founder-mark { margin: 0; font-family: var(--display); font-size: 5rem; line-height: .7; color: #d7b997; }
.echo-founder blockquote { max-width: 1050px; margin: 28px auto 32px; font-family: var(--display); font-size: clamp(2rem, 4.5vw, 5rem); line-height: 1.45; letter-spacing: -.035em; }
.echo-founder-by { margin: 0; font-family: var(--mono); font-size: .76rem; letter-spacing: .18em; color: rgba(255,249,239,.72); }

.echo-story { display: grid; grid-template-columns: 1.08fr .92fr; background: #DED4C5; }
.echo-story-image { min-height: 760px; }
.echo-story-image img { width: 100%; height: 100%; object-fit: cover; }
.echo-story-copy { padding: clamp(64px, 9vw, 130px); display: flex; flex-direction: column; justify-content: center; }
.echo-story-copy h2 { font-size: clamp(3rem, 5.4vw, 6rem); line-height: 1.05; margin-bottom: 42px; }
.echo-story-copy blockquote { margin: 0 0 32px; font-family: var(--display); font-size: clamp(1.25rem, 2vw, 1.75rem); line-height: 1.75; color: var(--ink); }
.echo-story-copy > p { line-height: 1.9; max-width: 590px; }
.echo-story-copy .echo-memory-line { margin-top: 26px; padding-left: 20px; border-left: 1px solid var(--gold); color: var(--ink-soft); }

.echo-voices, .echo-compare, .echo-intelligence, .echo-plans { padding: clamp(84px, 11vw, 160px) var(--pad-x); }
.echo-voice-grid { display: grid; grid-template-columns: repeat(3, 1fr); }
.echo-voice { margin: 0; min-height: 260px; padding: 18px clamp(28px, 3vw, 46px); display: flex; flex-direction: column; justify-content: space-between; }
.echo-voice:first-child { padding-left: 0; }
.echo-voice + .echo-voice { border-left: 1px solid var(--line); }
.echo-voice:last-child { padding-right: 0; }
.echo-voice-lead { grid-column: span 2; background: var(--terracotta); color: #fff9ef; }
.echo-voice p { font-family: var(--display); font-size: clamp(1.25rem, 2vw, 2rem); line-height: 1.65; }
.echo-voice cite { font-style: normal; font-size: .72rem; letter-spacing: .08em; color: var(--ink-mute); }
.echo-voice-lead cite { color: rgba(255,249,239,.7); }

.echo-compare { background: #d9cdbc; }
.echo-compare-grid { display: grid; grid-template-columns: minmax(260px, .72fr) minmax(0, 1.48fr); gap: clamp(18px, 2.5vw, 36px); align-items: stretch; }
.echo-compare-grid article { padding: clamp(38px, 5vw, 68px); display: flex; flex-direction: column; }
.echo-compare-old { min-height: 540px; align-self: center; background: rgba(243,239,231,.48); border: 1px solid rgba(41,37,34,.12); opacity: .78; }
.echo-compare-new { position: relative; z-index: 1; min-height: 660px; background: var(--ink); color: var(--paper); border-top: 5px solid var(--gold); box-shadow: 0 28px 70px rgba(41,37,34,.2); transform: translateY(-12px); }
.echo-compare-label { font-family: var(--mono); font-size: .76rem; letter-spacing: .16em; color: var(--terracotta); }
.echo-compare-new .echo-compare-label { color: #d7b997; }
.echo-compare h3 { margin: 28px 0 42px; font-size: clamp(1.65rem, 2.5vw, 2.75rem); line-height: 1.45; }
.echo-compare-new h3 { color: #fff9ef; font-size: clamp(2.2rem, 3.8vw, 4.4rem); line-height: 1.3; }
.echo-compare ul { list-style: none; margin: auto 0 0; padding: 0; border-top: 1px solid currentColor; }
.echo-compare li { position: relative; padding: 16px 0 16px 38px; border-bottom: 1px solid currentColor; line-height: 1.7; }
.echo-compare li::before { position: absolute; left: 0; top: 18px; width: 23px; height: 23px; display: grid; place-items: center; border-radius: 50%; font-family: var(--display); font-size: .82rem; line-height: 1; }
.echo-compare-old li::before { content: '×'; color: #87594f; border: 1px solid rgba(135,89,79,.4); background: rgba(135,89,79,.06); }
.echo-compare-new li::before { content: '✓'; color: var(--ink); background: #d7b997; font-weight: 700; }
.echo-compare li strong, .echo-compare li span { display: block; }
.echo-compare li strong { font-size: 1rem; font-weight: 500; }
.echo-compare li span { margin-top: 4px; font-size: .78rem; }
.echo-compare-old li { color: var(--ink-soft); }
.echo-compare-old li span { color: var(--ink-mute); }
.echo-compare-new li { color: rgba(243,239,231,.95); border-color: rgba(243,239,231,.2); }
.echo-compare-new li strong { color: #fff9ef; font-size: 1.08rem; }
.echo-compare-new li span { color: rgba(243,239,231,.65); }

.echo-intelligence { background: #e7dfd3; }
.echo-intelligence-lede { max-width: 920px; font-family: var(--display); font-size: clamp(1.25rem, 2vw, 1.75rem); line-height: 1.9; }
.echo-capability-grid { display: grid; grid-template-columns: repeat(4, 1fr); margin-top: 64px; border-top: 1px solid var(--line); }
.echo-capability-grid article { min-height: 250px; padding: 30px 24px 20px 0; border-right: 1px solid var(--line); }
.echo-capability-grid article + article { padding-left: 24px; }
.echo-capability-grid span { color: var(--gold); font-family: var(--mono); }
.echo-capability-grid h3 { margin: 46px 0 16px; font-size: 1.55rem; }
.echo-capability-grid p { color: var(--ink-soft); line-height: 1.8; }
.echo-model-note { margin: 50px 0 0; padding-top: 22px; border-top: 1px solid var(--line); color: var(--ink-mute); font-size: .78rem; }
.echo-service-line { display: grid; grid-template-columns: repeat(6, minmax(0, 1fr)); gap: 24px; margin-top: 72px; }
.echo-service-line article { position: relative; min-height: 260px; padding: 28px 20px; background: rgba(243,239,231,.62); border: 1px solid var(--line); }
.echo-service-line article:not(:last-child)::after { content: '→'; position: absolute; z-index: 2; top: 50%; right: -21px; width: 18px; color: var(--terracotta); font-size: 1.25rem; transform: translateY(-50%); }
.echo-service-line span { color: var(--terracotta); font-family: var(--mono); }
.echo-service-line h3 { margin: 52px 0 14px; font-size: 1.35rem; }
.echo-service-line p { color: var(--ink-soft); font-size: .82rem; line-height: 1.75; }
.echo-metrics-head { margin-top: clamp(90px, 11vw, 150px); display: grid; grid-template-columns: .6fr 1.4fr; gap: 40px; }
.echo-metrics-head h3 { font-size: clamp(2.2rem, 4vw, 4.6rem); line-height: 1.3; }
.echo-metrics-head h3 em { color: var(--terracotta); font-style: normal; font-weight: 400; }
.echo-team { margin-top: clamp(60px, 8vw, 104px); }
.echo-team-intro { display: grid; grid-template-columns: .6fr 1.4fr; gap: 40px; padding-bottom: 42px; }
.echo-team-intro h3 { font-size: clamp(1.8rem, 3vw, 3.2rem); line-height: 1.35; }
.echo-team-intro h3 em { color: var(--terracotta); font-style: normal; font-weight: 400; }
.echo-team-intro > div > p { max-width: 720px; margin-top: 22px; color: var(--ink-mute); line-height: 1.9; }
.echo-team-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: clamp(28px, 4vw, 62px); margin-top: 28px; }
.echo-team-member { min-width: 0; padding: 0 0 16px; }
.echo-team-avatar { display: block; width: clamp(104px, 11vw, 154px); aspect-ratio: 1; margin-bottom: 28px; border-radius: 50%; object-fit: cover; filter: saturate(.82) contrast(.96); }
.echo-team-member h4 { margin-top: 10px; font-family: var(--display); font-size: clamp(1.8rem, 2.4vw, 2.7rem); font-weight: 400; }
.echo-team-role { color: var(--terracotta); font-family: var(--mono); font-size: .68rem; letter-spacing: .14em; line-height: 1.45; }
.echo-team-school { margin: 9px 0 20px; color: var(--ink); font-size: .76rem; }
.echo-team-member > p:last-child { color: var(--ink-mute); font-size: .84rem; line-height: 1.85; }
.echo-metrics { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 64px 0; margin-top: 64px; }
.echo-metrics article { min-height: 180px; padding: 0 clamp(24px, 3vw, 44px); }
.echo-metrics article:nth-child(3n+1) { padding-left: 0; }
.echo-metrics article:not(:nth-child(3n+1)) { border-left: 1px solid var(--line); }
.echo-metrics strong, .echo-metrics span, .echo-metrics small { display: block; }
.echo-metrics strong { font-family: var(--display); font-size: clamp(2.6rem, 4.5vw, 5.2rem); color: var(--terracotta); font-weight: 400; }
.echo-metrics span { margin-top: 25px; font-size: 1.05rem; }
.echo-metrics small { margin-top: 8px; color: var(--ink-mute); font-size: .7rem; }

.echo-plan-grid { display: grid; grid-template-columns: 1fr 1fr; border: 1px solid var(--line); }
.echo-plan { min-height: 620px; padding: clamp(42px, 6vw, 80px); display: flex; flex-direction: column; }
.echo-plan + .echo-plan { border-left: 1px solid var(--line); }
.echo-plan-featured { background: var(--terracotta); color: #fff9ef; }
.echo-plan-label { font-family: var(--mono); font-size: .76rem; letter-spacing: .16em; }
.echo-plan h3 { margin: 16px 0 30px; font-size: clamp(2rem, 3.5vw, 3.7rem); }
.echo-price { display: flex; align-items: baseline; gap: 8px; }
.echo-price strong { font-family: var(--display); font-size: clamp(2.6rem, 4vw, 4.4rem); }
.echo-price span { font-size: .82rem; color: var(--ink-mute); }
.echo-plan-featured .echo-price span { color: rgba(255,249,239,.68); }
.echo-plan ul { list-style: none; padding: 0; margin: 42px 0; border-top: 1px solid currentColor; }
.echo-plan li { padding: 14px 0; border-bottom: 1px solid currentColor; }
.echo-plan .echo-button, .echo-plan .echo-text-link { margin-top: auto; align-self: flex-start; }
.echo-mini-entry { display: grid; grid-template-columns: .9fr 1.1fr; gap: clamp(42px, 8vw, 110px); align-items: end; margin-top: clamp(72px, 9vw, 120px); padding-top: clamp(42px, 5vw, 70px); border-top: 1px solid var(--line); }
.echo-mini-entry h3 { font-size: clamp(2rem, 3.6vw, 4rem); line-height: 1.3; }
.echo-mini-entry h3 em { color: var(--terracotta); font-style: normal; font-weight: 400; }
.echo-mini-entry-body > p, .echo-mini-entry-title > p:not(.echo-index) { max-width: 660px; color: var(--ink-soft); line-height: 1.9; }
.echo-mini-entry-body .echo-button, .echo-mini-entry-body .echo-text-link, .echo-mini-entry-title .echo-button { margin-top: 24px; }
.echo-style-samples { display: grid; grid-template-columns: repeat(3, 1fr); margin-bottom: 28px; }
.echo-style-samples span { padding: 7px 18px; color: var(--terracotta); font-family: var(--display); font-size: 1.1rem; text-align: center; }
.echo-style-samples span + span { border-left: 1px solid var(--line); }
.echo-mini-entry-question { margin-top: clamp(76px, 10vw, 130px); }
.echo-mini-entry-plan { margin-top: 0; padding: clamp(84px, 11vw, 150px) var(--pad-x); grid-template-columns: 1.2fr auto; align-items: center; background: #d9cdbc; border-top: 0; }
.echo-mini-entry-plan .echo-mini-entry-title > p:not(.echo-index) { margin-top: 24px; }
.echo-audio { margin-top: 30px; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); padding: 18px 0; display: grid; grid-template-columns: auto 1fr auto; gap: 16px; align-items: center; }
.echo-play { width: 44px; height: 44px; border: 1px solid var(--ink); border-radius: 50%; background: transparent; color: var(--ink); cursor: pointer; }
.echo-audio strong, .echo-audio span { display: block; }
.echo-audio strong { font-size: .82rem; }
.echo-audio span { font-size: .7rem; color: var(--ink-mute); margin-top: 4px; }
.echo-wave { height: 30px; display: flex; align-items: center; gap: 3px; }
.echo-wave i { width: 2px; height: 12px; background: var(--terracotta); }
.echo-wave i:nth-child(2), .echo-wave i:nth-child(7) { height: 22px; }
.echo-wave i:nth-child(3), .echo-wave i:nth-child(6) { height: 16px; }
.echo-wave i:nth-child(4) { height: 28px; }

.echo-outcomes { background: var(--ink); color: var(--paper); }
.echo-outcomes h2, .echo-outcomes h3, .echo-outcomes .echo-index { color: var(--paper); }
.echo-outcomes h2 em { color: #D7B997; }
.echo-outcome-grid { display: grid; grid-template-columns: repeat(4, 1fr); border-top: 1px solid rgba(243,239,231,.2); }
.echo-outcome { padding: 34px 28px 18px 0; min-height: 250px; border-right: 1px solid rgba(243,239,231,.2); }
.echo-outcome + .echo-outcome { padding-left: 28px; }
.echo-outcome > span { font-family: var(--mono); color: var(--gold); }
.echo-outcome h3 { font-size: clamp(1.35rem, 2vw, 2rem); line-height: 1.4; margin: 58px 0 16px; }
.echo-outcome p { color: rgba(243,239,231,.65); line-height: 1.8; }
.echo-photo-band { display: grid; grid-template-columns: repeat(4, 1fr); margin-top: 72px; border-top: 1px solid rgba(243,239,231,.2); }
.echo-photo-band figure { position: relative; margin: 0; min-height: 310px; overflow: hidden; border-right: 1px solid rgba(243,239,231,.2); }
.echo-photo-band figure:last-child { border-right: 0; }
.echo-photo-band img { width: 100%; height: 100%; object-fit: cover; filter: saturate(.72) sepia(.08); transition: transform .6s ease; }
.echo-photo-band figure:hover img { transform: scale(1.025); }
.echo-photo-band figcaption { position: absolute; inset: auto 18px 16px; padding-top: 36px; color: #fff9ef; font-size: .78rem; text-shadow: 0 2px 14px rgba(0,0,0,.7); }

.echo-path-grid { display: grid; grid-template-columns: 1fr 1fr; border: 1px solid var(--line); }
.echo-path { padding: clamp(42px, 6vw, 80px); min-height: 570px; display: flex; flex-direction: column; }
.echo-path + .echo-path { border-left: 1px solid var(--line); }
.echo-path-primary { background: var(--terracotta); color: var(--paper); }
.echo-path h3 { font-size: clamp(2.1rem, 3vw, 3.5rem); margin: 16px 0 26px; color: inherit; }
.echo-path p { color: var(--ink-soft); }
.echo-path-primary p, .echo-path-primary li { color: rgba(255,250,242,.8); }
.echo-path-label { font-family: var(--mono); font-size: .76rem; letter-spacing: .18em; }
.echo-path-intro { font-size: 1.08rem; line-height: 1.8; max-width: 520px; }
.echo-path ul { list-style: none; padding: 0; margin: 40px 0; border-top: 1px solid currentColor; }
.echo-path li { padding: 13px 0; border-bottom: 1px solid currentColor; font-size: .9rem; }
.echo-path .echo-button, .echo-path .echo-text-link { margin-top: auto; align-self: flex-start; }

.echo-process { background: #E7DFD3; }
.echo-process-list { list-style: none; padding: 0; margin: 0; border-top: 1px solid var(--line); }
.echo-process-list li { display: grid; grid-template-columns: 120px 1fr; gap: 28px; padding: 46px 0; border-bottom: 1px solid var(--line); }
.echo-process-list > li > span { font-family: var(--mono); font-size: 1.15rem; color: var(--terracotta); }
.echo-process-list div > p:first-child { font-family: var(--mono); letter-spacing: .18em; font-size: .7rem; color: var(--gold); }
.echo-process-list h3 { font-size: clamp(1.8rem, 3vw, 3rem); margin: 8px 0 12px; }

.echo-trust { padding: clamp(84px, 11vw, 160px) var(--pad-x); display: grid; grid-template-columns: .9fr 1.1fr; gap: 8vw; background: var(--olive); color: #FFF9EF; }
.echo-trust h2 { color: #FFF9EF; font-size: clamp(2.6rem, 4.8vw, 5.4rem); line-height: 1.18; }
.echo-trust h2 em { color: #E0C7A3; }
.echo-trust .echo-index { color: #F1DDC1; }
.echo-trust-grid { display: grid; grid-template-columns: 1fr 1fr; }
.echo-trust-grid article { padding: 30px; border: 1px solid rgba(255,255,255,.24); margin: -1px 0 0 -1px; min-height: 180px; }
.echo-trust-grid strong { font-family: var(--display); font-size: 1.35rem; }
.echo-trust-grid p { color: rgba(255,249,239,.7); margin-top: 42px; line-height: 1.7; }

.echo-faq-list { border-top: 1px solid var(--line); }
.echo-faq details { border-bottom: 1px solid var(--line); padding: 0; }
.echo-faq summary { list-style: none; cursor: pointer; padding: 28px 52px 28px 0; font-family: var(--display); font-size: clamp(1.15rem, 2vw, 1.6rem); position: relative; }
.echo-faq summary::-webkit-details-marker { display: none; }
.echo-faq summary::after { content: '+'; position: absolute; right: 8px; top: 24px; color: var(--terracotta); font-family: var(--sans); font-weight: 300; font-size: 1.8rem; }
.echo-faq details[open] summary::after { content: '−'; }
.echo-faq details p { max-width: 760px; padding: 0 0 28px; line-height: 1.85; }

.echo-qr { display: flex; gap: 24px; align-items: flex-end; }
.echo-qr-placeholder { width: min(240px, 52vw); aspect-ratio: 1; border: 1px solid var(--ink); display: grid; place-content: center; text-align: center; background: var(--paper); }
.echo-qr-placeholder span { font-family: var(--display); font-size: 1.5rem; }
.echo-qr-placeholder small { color: var(--terracotta); margin-top: 8px; }
.echo-qr p { font-size: .78rem; color: var(--ink-soft); }

.echo-footer { padding: 54px var(--pad-x) 90px; display: grid; grid-template-columns: 1.3fr .7fr; gap: 28px 60px; border-top: 1px solid var(--line); }
.echo-footer div strong, .echo-footer div span { display: block; }
.echo-footer div strong { font-family: var(--display); font-size: 1.6rem; }
.echo-footer div span { margin-top: 8px; color: var(--ink-soft); }
.echo-footer nav { display: flex; gap: 24px; justify-content: flex-end; font-size: .82rem; }
.echo-footer > p { font-size: .68rem; color: var(--ink-mute); }
.echo-credit { text-align: right; }
.echo-mobile-cta { display: none; }

@media (max-width: 1024px) {
  .echo-hero { grid-template-columns: 1fr 1fr; }
  .echo-hero-copy { padding-inline: 36px; }
  .echo-section-head { grid-template-columns: 1fr; }
  .echo-story-copy { padding: 60px 44px; }
  .echo-outcome-grid { grid-template-columns: 1fr 1fr; }
  .echo-outcome:nth-child(2) { border-right: 0; }
  .echo-outcome:nth-child(n+3) { border-top: 1px solid rgba(243,239,231,.2); }
  .echo-trust { grid-template-columns: 1fr; }
  .echo-service-line { grid-template-columns: repeat(3, 1fr); row-gap: 42px; }
  .echo-service-line article:nth-child(3)::after { display: none; }
  .echo-metrics-head, .echo-team-intro { grid-template-columns: 1fr; }
  .echo-team-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 768px) {
  body { padding-bottom: calc(66px + env(safe-area-inset-bottom)); }
  .echo-header { min-height: 66px; grid-template-columns: 1fr auto; padding-block: 10px; }
  .echo-header-link { display: none; }
  .echo-header .echo-button { display: none; }
  .echo-brand-cn { font-size: 1.4rem; }
  .echo-hero { grid-template-columns: 1fr; min-height: auto; }
  .echo-hero-copy { padding: 70px 22px 56px; }
  .echo-hero h1 { font-size: clamp(2.75rem, 13vw, 4.5rem); margin-block: 22px 26px; }
  .echo-lede { font-size: 1rem; line-height: 1.82; }
  .echo-actions { align-items: flex-start; flex-direction: column; gap: 22px; }
  .echo-hero-note { margin-top: 40px; gap: 10px 18px; }
  .echo-hero-visual { min-height: 68svh; }
  .echo-questions, .echo-outcomes, .echo-paths, .echo-process, .echo-faq { padding: 84px 22px; }
  .echo-section-head { margin-bottom: 48px; gap: 14px; }
  .echo-section-head h2 { font-size: clamp(2.35rem, 11vw, 3.4rem); }
  .echo-question { grid-template-columns: 42px 1fr; padding: 30px 0; }
  .echo-question p { font-size: 1.45rem; }
  .echo-founder { padding: 90px 22px; }
  .echo-founder blockquote { font-size: 2.2rem; line-height: 1.55; }
  .echo-story { grid-template-columns: 1fr; }
  .echo-story-image { min-height: 58svh; }
  .echo-story-copy { padding: 70px 22px; }
  .echo-story-copy h2 { font-size: 3.2rem; }
  .echo-voices, .echo-compare, .echo-intelligence, .echo-plans { padding: 84px 22px; }
  .echo-voice-grid, .echo-compare-grid, .echo-capability-grid, .echo-plan-grid { grid-template-columns: 1fr; }
  .echo-voice-lead { grid-column: auto; }
  .echo-voice, .echo-voice:first-child, .echo-voice:last-child { min-height: 220px; padding: 30px 0; }
  .echo-voice + .echo-voice { border-left: 0; border-top: 1px solid var(--line); }
  .echo-compare-grid article { padding: 46px 24px; }
  .echo-compare-old { min-height: 480px; }
  .echo-compare-new { min-height: 620px; transform: none; }
  .echo-compare-new h3 { font-size: 2.55rem; }
  .echo-capability-grid article, .echo-capability-grid article + article { min-height: 190px; padding: 28px 0; border-right: 0; border-bottom: 1px solid var(--line); }
  .echo-capability-grid h3 { margin-top: 28px; }
  .echo-service-line { grid-template-columns: 1fr; gap: 34px; }
  .echo-service-line article { min-height: 210px; }
  .echo-service-line article:not(:last-child)::after { display: block; content: '↓'; top: auto; right: 50%; bottom: -29px; transform: translateX(50%); }
  .echo-service-line h3 { margin-top: 34px; }
  .echo-metrics { grid-template-columns: repeat(2, minmax(0, 1fr)); margin-top: 42px; }
  .echo-metrics article, .echo-metrics article:nth-child(3n+1) { min-height: 180px; padding: 0 18px; border-left: 0; }
  .echo-metrics article:nth-child(odd) { padding-left: 0; }
  .echo-metrics article:nth-child(even) { border-left: 1px solid var(--line); }
  .echo-team-grid { grid-template-columns: 1fr; }
  .echo-team-member { display: grid; grid-template-columns: 92px 1fr; column-gap: 22px; align-items: start; }
  .echo-team-avatar { grid-row: 1 / span 4; width: 92px; margin: 0; }
  .echo-team-member h4 { margin-top: 8px; }
  .echo-team-member > p:last-child { grid-column: 2; }
  .echo-plan { min-height: 570px; padding: 52px 26px; }
  .echo-plan + .echo-plan { border-left: 0; border-top: 1px solid var(--line); }
  .echo-mini-entry { grid-template-columns: 1fr; gap: 36px; }
  .echo-mini-entry-plan { padding: 84px 22px; }
  .echo-style-samples span { padding-inline: 10px; font-size: .92rem; }
  .echo-audio { grid-template-columns: auto 1fr; }
  .echo-wave { display: none; }
  .echo-outcome-grid { grid-template-columns: 1fr; }
  .echo-outcome, .echo-outcome + .echo-outcome { min-height: 200px; padding: 28px 0; border-right: 0; border-top: 1px solid rgba(243,239,231,.2); }
  .echo-outcome:first-child { border-top: 0; }
  .echo-outcome h3 { margin: 36px 0 12px; }
  .echo-photo-band { grid-template-columns: 1fr 1fr; margin-top: 48px; }
  .echo-photo-band figure { min-height: 250px; border-bottom: 1px solid rgba(243,239,231,.2); }
  .echo-path-grid { grid-template-columns: 1fr; }
  .echo-path { min-height: 520px; padding: 52px 26px; }
  .echo-path + .echo-path { border-left: 0; border-top: 1px solid var(--line); }
  .echo-process-list li { grid-template-columns: 52px 1fr; gap: 12px; padding: 34px 0; }
  .echo-trust { padding: 84px 22px; gap: 48px; }
  .echo-trust h2 { font-size: 3rem; }
  .echo-trust-grid { grid-template-columns: 1fr; }
  .echo-trust-grid article { min-height: 140px; }
  .echo-trust-grid p { margin-top: 24px; }
  .echo-qr { margin-top: 34px; align-items: center; }
  .echo-footer { padding: 50px 22px 42px; grid-template-columns: 1fr; }
  .echo-footer nav { justify-content: flex-start; flex-wrap: wrap; }
  .echo-credit { text-align: left; }
  .echo-mobile-cta { position: fixed; display: flex; z-index: 100; left: 12px; right: 12px; bottom: calc(10px + env(safe-area-inset-bottom)); height: 54px; padding: 0 20px; align-items: center; justify-content: space-between; background: var(--terracotta); color: white; box-shadow: 0 12px 28px rgba(41,37,34,.24); }
}

@media (max-width: 360px) {
  .echo-header, .echo-hero-copy, .echo-questions, .echo-voices, .echo-compare, .echo-intelligence, .echo-outcomes, .echo-paths, .echo-process, .echo-trust, .echo-plans, .echo-faq, .echo-mini-entry-plan, .echo-footer { padding-left: 18px; padding-right: 18px; }
  .echo-hero h1 { font-size: 2.3rem; line-height: 1.16; }
  .echo-story-copy h2 { font-size: 2.7rem; }
  .echo-section-head h2 { font-size: 2.15rem; }
  .echo-photo-band { grid-template-columns: 1fr; }
  .echo-photo-band figure { min-height: 290px; border-right: 0; }
  .echo-mobile-cta { left: 10px; right: 10px; }
}

/* 官网增强：小程序入口、场景插画、当前套餐 */
.echo-qr-strip { display: grid; grid-template-columns: 1fr auto; gap: clamp(32px, 6vw, 86px); align-items: center; padding: clamp(54px, 7vw, 92px) var(--pad-x); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); background: #fffaf5; }
.echo-qr-strip h2 { max-width: 720px; margin: 14px 0 0; font-size: clamp(2rem, 3.8vw, 4.2rem); line-height: 1.18; letter-spacing: -.045em; }
.echo-qr-strip-mid { background: #f5f0e8; }
.echo-hero-visual img[src*="hero-parent-memoir"] { object-position: center; }
.echo-scenes { padding: clamp(84px, 11vw, 160px) var(--pad-x); background: #fffaf5; }
.scene-grid { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 24px; }
.scene-card { overflow: hidden; border: 1px solid var(--line); background: var(--paper); box-shadow: 0 16px 46px rgba(44,41,39,.06); }
.scene-card img { width: 100%; aspect-ratio: 3 / 4; object-fit: cover; display: block; background: var(--paper-soft); }
.scene-card div { padding: 26px 26px 32px; }
.scene-card span { color: var(--terracotta); font-family: var(--mono); font-size: .78rem; font-weight: 700; letter-spacing: .14em; }
.scene-card h3 { margin: 14px 0 12px; font-size: clamp(1.35rem, 1.8vw, 1.9rem); line-height: 1.3; }
.scene-card p { margin: 0; color: var(--ink-soft); line-height: 1.8; }
.plan-table { overflow: hidden; border: 1px solid var(--line); background: var(--paper); }
.plan-row { display: grid; grid-template-columns: .95fr 1fr 1.45fr .7fr; }
.plan-row > div { padding: 22px 24px; border-top: 1px solid var(--line); border-right: 1px solid var(--line); line-height: 1.7; }
.plan-row > div:last-child { border-right: 0; }
.plan-row:first-child > div { border-top: 0; }
.plan-head { background: #f5f0e8; color: var(--deep); font-weight: 800; }
.plan-row strong, .plan-row span { display: block; }
.plan-row span { margin-top: 4px; color: var(--ink-mute); font-size: .84rem; }
.plan-row.featured { background: #fff7f2; }
.plan-row.featured > div:first-child { border-left: 5px solid var(--terracotta); }
.plan-row.muted { background: #faf8f4; color: var(--ink-soft); }
.plan-note { margin: 20px 0 0; color: var(--ink-mute); line-height: 1.75; }

@media (max-width: 768px) {
  .echo-qr-strip { grid-template-columns: 1fr; padding: 72px 22px; }
  .scene-grid { grid-template-columns: 1fr; }
  .plan-head { display: none; }
  .plan-row { display: block; padding: 22px 24px; border-top: 1px solid var(--line); }
  .plan-row:nth-child(2) { border-top: 0; }
  .plan-row > div { padding: 6px 0; border: 0; }
  .plan-row > div:nth-child(1) strong { font-size: 1.32rem; }
  .plan-row.featured > div:first-child { padding-left: 14px; }
}

/* Brand opening — AI = I */
.echo-header-tech {
  color: #f7f8ff;
  background: rgba(5, 6, 10, .78);
  border-bottom-color: rgba(255, 255, 255, .09);
  backdrop-filter: blur(22px) saturate(150%);
}
.echo-header-tech .echo-button {
  color: #090b12;
  background: #f7f8ff;
  border-color: rgba(255, 255, 255, .9);
}
.echo-header-tech .echo-button:hover { background: #dce8ff; }

.echo-hero-tech {
  position: relative;
  min-height: calc(100svh - 76px);
  display: grid;
  grid-template-columns: 1fr;
  place-items: center;
  isolation: isolate;
  overflow: hidden;
  padding: clamp(88px, 10vw, 142px) var(--pad-x) clamp(76px, 8vw, 112px);
  color: #f7f8ff;
  border: 0;
  background:
    radial-gradient(circle at 50% 42%, rgba(82, 118, 255, .15), transparent 35%),
    linear-gradient(145deg, #030408 0%, #080b15 52%, #020205 100%);
}
.echo-tech-grid {
  position: absolute;
  z-index: -2;
  inset: 0;
  opacity: .18;
  background-image:
    linear-gradient(rgba(132, 154, 255, .12) 1px, transparent 1px),
    linear-gradient(90deg, rgba(132, 154, 255, .12) 1px, transparent 1px);
  background-size: 76px 76px;
  mask-image: radial-gradient(circle at center, black 4%, transparent 70%);
}
.echo-tech-aura { position: absolute; z-index: -1; inset: 0; pointer-events: none; }
.echo-tech-aura i {
  position: absolute;
  left: 50%;
  top: 46%;
  width: min(82vw, 980px);
  aspect-ratio: 1;
  border: 1px solid rgba(142, 171, 255, .15);
  border-radius: 50%;
  transform: translate(-50%, -50%);
  box-shadow: inset 0 0 90px rgba(94, 106, 255, .035), 0 0 110px rgba(53, 89, 255, .035);
  animation: echo-orbit 10s ease-in-out infinite;
}
.echo-tech-aura i:nth-child(2) { width: min(58vw, 690px); border-color: rgba(207, 122, 255, .18); animation-delay: -3s; }
.echo-tech-aura i:nth-child(3) { width: min(36vw, 430px); border-color: rgba(96, 220, 255, .21); animation-delay: -6s; }
.echo-hero-tech-copy { position: relative; z-index: 2; max-width: 1180px; text-align: center; }
.echo-tech-kicker {
  margin: 0 0 clamp(30px, 4vw, 52px);
  color: rgba(221, 228, 255, .6);
  font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, sans-serif;
  font-size: clamp(.72rem, .9vw, .88rem);
  font-weight: 500;
  letter-spacing: .28em;
}
.echo-hero-tech .echo-formula {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: clamp(18px, 3vw, 48px);
  margin: 0;
  color: #fff;
  font-family: -apple-system, BlinkMacSystemFont, 'Noto Sans SC', sans-serif;
  font-size: clamp(7.4rem, 22vw, 21rem);
  font-weight: 650;
  letter-spacing: -.085em;
  line-height: .73;
  text-shadow: 0 0 54px rgba(112, 142, 255, .15);
}
.echo-formula > span { display: inline-block; opacity: 0; }
.echo-formula-ai {
  background: linear-gradient(125deg, #ffffff 5%, #b7d6ff 32%, #9d86ff 64%, #ffb8dd 92%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  animation: echo-word-in 1.15s .25s cubic-bezier(.16, 1, .3, 1) forwards;
}
.echo-formula-equals {
  color: rgba(230, 236, 255, .62);
  font-size: .38em;
  font-weight: 300;
  letter-spacing: 0;
  animation: echo-symbol-in .8s 1.15s ease forwards;
}
.echo-formula-i {
  min-width: .44em;
  background: linear-gradient(180deg, #fff 0%, #70e7ff 46%, #9c82ff 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  animation: echo-i-in 1.15s 1.55s cubic-bezier(.16, 1, .3, 1) forwards;
}
.echo-brand-reveal {
  display: flex;
  justify-content: center;
  gap: clamp(16px, 3.4vw, 52px);
  margin-top: clamp(40px, 6vw, 74px);
  color: #f4f7ff;
  font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, sans-serif;
  font-size: clamp(2rem, 4.2vw, 4.8rem);
  font-weight: 300;
  letter-spacing: .12em;
}
.echo-brand-reveal span { opacity: 0; filter: blur(18px); transform: translateY(22px); animation: echo-character-in 1.05s cubic-bezier(.16, 1, .3, 1) forwards; }
.echo-brand-reveal span:nth-child(1) { animation-delay: 2.45s; }
.echo-brand-reveal span:nth-child(2) { animation-delay: 2.68s; }
.echo-brand-reveal span:nth-child(3) { animation-delay: 2.91s; }
.echo-tech-definition {
  margin: clamp(32px, 4vw, 48px) auto 0;
  color: rgba(237, 241, 255, .84);
  font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, sans-serif;
  font-size: clamp(1.05rem, 1.5vw, 1.35rem);
  letter-spacing: .025em;
  opacity: 0;
  animation: echo-copy-in 1s 3.35s ease forwards;
}
.echo-tech-definition strong { color: #fff; font-weight: 600; }
.echo-tech-lede {
  max-width: 780px;
  margin: 18px auto 0;
  color: rgba(213, 220, 242, .6);
  font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, sans-serif;
  font-size: clamp(.96rem, 1.2vw, 1.1rem);
  line-height: 1.9;
  opacity: 0;
  animation: echo-copy-in 1s 3.55s ease forwards;
}
.echo-tech-cta {
  display: inline-flex;
  align-items: center;
  gap: 22px;
  margin-top: clamp(34px, 5vw, 52px);
  padding: 13px 0 10px;
  color: rgba(244, 247, 255, .88);
  border-bottom: 1px solid rgba(210, 222, 255, .34);
  font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, sans-serif;
  font-size: .86rem;
  letter-spacing: .08em;
  opacity: 0;
  animation: echo-copy-in 1s 3.75s ease forwards;
}
.echo-tech-cta span { animation: echo-arrow 1.8s 4s ease-in-out infinite; }
.echo-signal {
  position: absolute;
  left: 50%;
  bottom: clamp(22px, 3vw, 38px);
  display: flex;
  align-items: center;
  gap: 5px;
  height: 28px;
  transform: translateX(-50%);
  opacity: .44;
}
.echo-signal span { width: 1px; height: 8px; background: linear-gradient(#7cecff, #aa7cff); animation: echo-signal 1.65s ease-in-out infinite; }
.echo-signal span:nth-child(2), .echo-signal span:nth-child(8) { animation-delay: -.15s; }
.echo-signal span:nth-child(3), .echo-signal span:nth-child(7) { animation-delay: -.3s; }
.echo-signal span:nth-child(4), .echo-signal span:nth-child(6) { animation-delay: -.45s; }
.echo-signal span:nth-child(5) { animation-delay: -.6s; }
.echo-hero-footnote {
  position: absolute;
  right: var(--pad-x);
  bottom: clamp(22px, 3vw, 38px);
  margin: 0;
  color: rgba(218, 225, 246, .45);
  font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, sans-serif;
  font-size: .72rem;
  line-height: 1.65;
  text-align: right;
  letter-spacing: .04em;
}
.echo-hero-footnote em { color: #a9ceff; font-style: normal; }

.echo-scenes-tech {
  padding: clamp(92px, 11vw, 166px) var(--pad-x);
  color: #f7f8ff;
  background: linear-gradient(180deg, #060812 0%, #0b0e18 100%);
}
.echo-scenes-intro { display: grid; grid-template-columns: .55fr 1.1fr .9fr; gap: clamp(28px, 5vw, 76px); align-items: end; margin-bottom: clamp(54px, 7vw, 92px); }
.echo-tech-label { align-self: start; margin: 12px 0 0; color: #8dafff; font-family: 'Noto Sans SC', sans-serif; font-size: .74rem; font-weight: 600; letter-spacing: .22em; }
.echo-scenes-intro h2 { color: #f7f8ff; font-family: 'Noto Sans SC', sans-serif; font-size: clamp(2.8rem, 5.3vw, 6rem); font-weight: 500; line-height: 1.08; letter-spacing: -.06em; }
.echo-scenes-intro h2 em { background: linear-gradient(100deg, #87eaff, #9d8cff 54%, #ffb9d5); -webkit-background-clip: text; background-clip: text; color: transparent; font-style: normal; }
.echo-scenes-intro > p:last-child { max-width: 510px; margin: 0; color: rgba(218, 225, 246, .62); font-family: 'Noto Sans SC', sans-serif; font-size: 1rem; line-height: 1.9; }
.scene-grid-tech { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: clamp(18px, 2.4vw, 34px); }
.scene-card-tech { position: relative; min-height: min(72vw, 750px); overflow: hidden; border: 1px solid rgba(255, 255, 255, .11); border-radius: 30px; background: #10131e; box-shadow: 0 28px 90px rgba(0, 0, 0, .28); }
.scene-card-tech img { width: 100%; height: 100%; aspect-ratio: auto; object-fit: cover; filter: saturate(.9) contrast(1.02); transition: transform 1s cubic-bezier(.16, 1, .3, 1), filter .6s ease; }
.scene-card-tech::after { content: ''; position: absolute; inset: 0; background: linear-gradient(180deg, transparent 36%, rgba(4, 6, 12, .2) 53%, rgba(4, 6, 12, .96) 100%); pointer-events: none; }
.scene-card-tech > div { position: absolute; z-index: 2; inset: auto 0 0; padding: clamp(28px, 4vw, 56px); }
.scene-card-tech span { color: #9fc0ff; font-family: 'Noto Sans SC', sans-serif; font-size: .72rem; font-weight: 600; letter-spacing: .16em; }
.scene-card-tech h3 { max-width: 580px; margin: 18px 0 13px; color: #fff; font-family: 'Noto Sans SC', sans-serif; font-size: clamp(1.65rem, 2.7vw, 3rem); font-weight: 500; line-height: 1.23; letter-spacing: -.04em; }
.scene-card-tech p { max-width: 560px; color: rgba(230, 234, 249, .67); font-family: 'Noto Sans SC', sans-serif; font-size: clamp(.88rem, 1vw, 1rem); line-height: 1.75; }
.scene-card-tech:hover img { transform: scale(1.035); filter: saturate(1.05) contrast(1.03); }

@keyframes echo-word-in { from { opacity: 0; filter: blur(24px); transform: scale(.88) translateY(24px); } to { opacity: 1; filter: blur(0); transform: scale(1) translateY(0); } }
@keyframes echo-symbol-in { from { opacity: 0; transform: scaleX(.15); } to { opacity: 1; transform: scaleX(1); } }
@keyframes echo-i-in { from { opacity: 0; filter: blur(20px); transform: translateX(42px); } to { opacity: 1; filter: blur(0); transform: translateX(0); } }
@keyframes echo-character-in { to { opacity: 1; filter: blur(0); transform: translateY(0); } }
@keyframes echo-copy-in { from { opacity: 0; transform: translateY(12px); } to { opacity: 1; transform: translateY(0); } }
@keyframes echo-orbit { 0%, 100% { opacity: .45; transform: translate(-50%, -50%) scale(.96); } 50% { opacity: 1; transform: translate(-50%, -50%) scale(1.035); } }
@keyframes echo-signal { 0%, 100% { height: 6px; opacity: .4; } 50% { height: 27px; opacity: 1; } }
@keyframes echo-arrow { 0%, 100% { transform: translateY(-2px); } 50% { transform: translateY(5px); } }

@media (max-width: 900px) {
  .echo-scenes-intro { grid-template-columns: 1fr; align-items: start; }
  .echo-scenes-intro > p:last-child { max-width: 650px; }
}

@media (max-width: 768px) {
  .echo-hero-tech { min-height: calc(100svh - 66px); padding: 92px 20px 110px; }
  .echo-hero-tech .echo-formula { gap: 14px; font-size: clamp(6.2rem, 30vw, 10rem); line-height: .8; }
  .echo-tech-kicker { margin-bottom: 42px; font-size: .65rem; letter-spacing: .2em; }
  .echo-brand-reveal { margin-top: 44px; gap: 20px; font-size: clamp(1.8rem, 10vw, 3.2rem); }
  .echo-tech-definition { max-width: 310px; font-size: 1rem; line-height: 1.75; }
  .echo-tech-lede { max-width: 335px; font-size: .9rem; }
  .echo-tech-lede br { display: none; }
  .echo-tech-aura i { width: 128vw; }
  .echo-tech-aura i:nth-child(2) { width: 91vw; }
  .echo-tech-aura i:nth-child(3) { width: 58vw; }
  .echo-hero-footnote { display: none; }
  .echo-scenes-tech { padding: 90px 20px; }
  .echo-scenes-intro { margin-bottom: 48px; }
  .echo-scenes-intro h2 { font-size: clamp(2.65rem, 13vw, 4.2rem); }
  .scene-grid-tech { grid-template-columns: 1fr; }
  .scene-card-tech { min-height: 132vw; max-height: 720px; border-radius: 22px; }
  .scene-card-tech > div { padding: 30px 24px; }
  .scene-card-tech h3 { font-size: clamp(1.65rem, 7.5vw, 2.35rem); }
}

@media (prefers-reduced-motion: reduce) {
  .echo-formula > span,
  .echo-brand-reveal span,
  .echo-tech-definition,
  .echo-tech-lede,
  .echo-tech-cta { opacity: 1; filter: none; transform: none; animation: none; }
  .echo-tech-aura i,
  .echo-signal span,
  .echo-tech-cta span { animation: none; }
}

/* 2026 light product system — one type scale, white canvas, layered cards */
body {
  background: #fff;
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
}
body, button, input, textarea, select,
h1, h2, h3, h4,
.echo-index, .echo-kicker, .echo-compare-label, .echo-path-label,
.echo-team-role, .echo-tech-label { font-family: var(--sans); }
h1, h2, h3, h4 { color: var(--ink); font-weight: 600; letter-spacing: -.04em; }
h1 em, h2 em, h3 em { color: inherit; font-style: normal; font-weight: inherit; }
p { color: var(--ink-soft); }

.echo-header-tech {
  min-height: 64px;
  padding: 10px clamp(20px, 4vw, 64px);
  color: var(--ink);
  background: rgba(255, 255, 255, .82);
  border-bottom: 1px solid var(--line-soft);
  backdrop-filter: saturate(180%) blur(22px);
}
.echo-brand-cn { font-size: 1.28rem; font-weight: 600; letter-spacing: -.03em; }
.echo-button,
.echo-header-tech .echo-button,
.echo-button-light {
  min-height: 44px;
  padding: 10px 20px;
  color: #fff;
  background: #0071e3;
  border: 1px solid #0071e3;
  border-radius: 999px;
  font-family: var(--sans);
  font-size: .9rem;
  font-weight: 500;
  letter-spacing: 0;
  box-shadow: none;
}
.echo-button:hover,
.echo-header-tech .echo-button:hover,
.echo-button-light:hover { color: #fff; background: #0077ed; transform: none; }
.echo-text-link { color: #0066cc; border: 0; font-family: var(--sans); font-size: 1rem; }

main > section,
main > aside {
  margin: 14px clamp(8px, 1.2vw, 20px);
  border-radius: var(--card-radius);
  overflow: hidden;
}

.echo-hero-tech {
  min-height: calc(100svh - 92px);
  margin-top: 12px;
  padding: clamp(88px, 10vw, 138px) var(--pad-x) clamp(82px, 9vw, 124px);
  color: var(--ink);
  border: 0;
  background:
    radial-gradient(circle at 72% 18%, rgba(171, 205, 255, .34), transparent 24%),
    radial-gradient(circle at 30% 80%, rgba(223, 205, 255, .3), transparent 27%),
    #f5f5f7;
}
.echo-tech-grid { display: none; }
.echo-tech-aura i {
  border: 0;
  background: rgba(255, 255, 255, .64);
  box-shadow: 0 30px 100px rgba(40, 70, 130, .08);
  opacity: .72;
  animation: echo-light-breathe 7s ease-in-out infinite;
}
.echo-tech-aura i:nth-child(2) { background: rgba(255, 255, 255, .48); }
.echo-tech-aura i:nth-child(3) { display: none; }
.echo-hero-tech-copy { max-width: 980px; }
.echo-hero-tech .echo-formula {
  gap: clamp(0px, 1vw, 16px);
  color: var(--ink);
  font-size: clamp(7rem, 20vw, 18rem);
  font-weight: 650;
  line-height: .82;
  letter-spacing: -.095em;
  text-shadow: none;
}
.echo-formula-ai {
  color: #1d1d1f;
  background: none;
  animation: echo-ai-slide .85s .15s cubic-bezier(.16, 1, .3, 1) forwards;
}
.echo-formula-equals {
  margin-inline: -.08em;
  color: #86868b;
  font-size: .42em;
  font-weight: 400;
  animation: echo-comma-in .45s .72s ease forwards;
}
.echo-formula-i {
  min-width: .38em;
  background: linear-gradient(145deg, #0071e3 5%, #5e5ce6 54%, #bf5af2 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  animation: echo-i-slide .9s .92s cubic-bezier(.16, 1, .3, 1) forwards;
}
.echo-brand-reveal { display: none; }
.echo-tech-definition {
  margin-top: clamp(46px, 5vw, 68px);
  color: var(--ink);
  font-size: clamp(1.15rem, 1.7vw, 1.45rem);
  font-weight: 400;
  letter-spacing: -.02em;
  animation-delay: 1.55s;
}
.echo-tech-definition strong { color: var(--ink); font-weight: 600; }
.echo-tech-lede {
  max-width: 680px;
  margin-top: 14px;
  color: var(--ink-soft);
  font-size: 1rem;
  line-height: 1.8;
  animation-delay: 1.72s;
}
.echo-tech-cta {
  gap: 14px;
  margin-top: 34px;
  padding: 11px 18px;
  color: #0066cc;
  background: rgba(255, 255, 255, .74);
  border: 0;
  border-radius: 999px;
  font-size: .94rem;
  letter-spacing: 0;
  box-shadow: 0 8px 28px rgba(0, 0, 0, .05);
  animation-delay: 1.9s;
}
.echo-signal { opacity: .42; }
.echo-signal span { width: 2px; border-radius: 2px; background: #0071e3; }
.echo-hero-footnote { color: var(--ink-mute); font-size: .78rem; }
.echo-hero-footnote em { color: #0066cc; }

.echo-scenes-tech,
.echo-questions,
.echo-voices,
.echo-compare,
.echo-intelligence,
.echo-outcomes,
.echo-paths,
.echo-plans,
.echo-faq,
.echo-qr-strip,
.echo-mini-entry-plan {
  color: var(--ink);
  background: #f5f5f7;
}
.echo-scenes-tech { padding: clamp(88px, 9vw, 132px) var(--pad-x); }
.echo-scenes-intro { grid-template-columns: .55fr 1.1fr .9fr; margin-bottom: clamp(48px, 6vw, 76px); }
.echo-tech-label,
.echo-index,
.echo-compare-label,
.echo-path-label,
.echo-team-role {
  color: var(--ink-mute);
  font-size: .78rem;
  font-weight: 600;
  letter-spacing: .08em;
  text-transform: uppercase;
}
.echo-index::before { display: none; }
.echo-scenes-intro h2,
.echo-section-head h2,
.echo-trust h2 {
  color: var(--ink);
  font-size: clamp(2.5rem, 4.4vw, 4.8rem);
  font-weight: 600;
  line-height: 1.1;
  letter-spacing: -.055em;
}
.echo-scenes-intro h2 em,
.echo-section-head h2 em,
.echo-trust h2 em {
  color: var(--ink);
  background: none;
  -webkit-text-fill-color: currentColor;
}
.echo-scenes-intro > p:last-child { color: var(--ink-soft); font-size: 1rem; line-height: 1.75; }

.scene-grid-tech { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 22px; }
.scene-card-tech {
  min-height: 0;
  display: grid;
  grid-template-columns: minmax(180px, .78fr) minmax(0, 1fr);
  align-items: center;
  padding: 14px;
  border: 0;
  border-radius: 28px;
  background: #fff;
  box-shadow: 0 1px 2px rgba(0, 0, 0, .02);
}
.scene-card-tech::after { display: none; }
.scene-card-tech img {
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 5;
  object-fit: cover;
  border-radius: 20px;
  filter: saturate(.72) brightness(1.04) contrast(.94);
}
.scene-card-tech > div { position: static; padding: clamp(22px, 3vw, 38px); }
.scene-card-tech span { color: var(--ink-mute); font-size: .74rem; letter-spacing: .06em; }
.scene-card-tech h3 { margin: 16px 0 12px; color: var(--ink); font-size: clamp(1.45rem, 2vw, 2.2rem); font-weight: 600; line-height: 1.25; letter-spacing: -.04em; }
.scene-card-tech p { color: var(--ink-soft); font-size: .95rem; line-height: 1.7; }
.scene-card-tech:hover img { transform: none; filter: saturate(.78) brightness(1.04) contrast(.96); }

.echo-qr-strip { padding: clamp(48px, 6vw, 76px) var(--pad-x); border: 0; }
.echo-qr-strip h2 { color: var(--ink); font-size: clamp(2rem, 3.3vw, 3.6rem); font-weight: 600; }
.echo-qr-placeholder { border: 0; border-radius: 22px; background: #fff; box-shadow: inset 0 0 0 1px var(--line); }
.echo-qr-placeholder span { font-family: var(--sans); font-size: 1.2rem; font-weight: 500; }
.echo-qr-placeholder small, .echo-qr p { color: var(--ink-mute); }

.echo-section-head { grid-template-columns: .45fr 1.55fr; gap: clamp(24px, 5vw, 72px); }
.echo-section-head cite { color: var(--ink-mute); font-family: var(--sans); font-style: normal; }
.echo-story { padding: 18px; grid-template-columns: 1.05fr .95fr; background: #f5f5f7; }
.echo-story-image { min-height: 620px; overflow: hidden; border-radius: 24px; }
.echo-story-copy { padding: clamp(48px, 7vw, 96px); }
.echo-story-copy h2 { color: var(--ink); font-size: clamp(2.5rem, 4.4vw, 4.8rem); font-weight: 600; line-height: 1.08; }
.echo-story-copy blockquote { color: var(--ink-soft); font-family: var(--sans); font-size: clamp(1.08rem, 1.5vw, 1.3rem); line-height: 1.75; }

.echo-voice-grid { gap: 16px; }
.echo-voice,
.echo-voice:first-child,
.echo-voice:last-child {
  min-height: 260px;
  padding: clamp(26px, 3vw, 40px);
  border: 0;
  border-radius: 24px;
  background: #fff;
}
.echo-voice + .echo-voice { border: 0; }
.echo-voice p { color: var(--ink); font-family: var(--sans); font-size: clamp(1.1rem, 1.55vw, 1.35rem); line-height: 1.65; }
.echo-mini-entry { gap: clamp(32px, 6vw, 80px); padding: clamp(34px, 5vw, 58px); border: 0; border-radius: 26px; background: #fff; }
.echo-mini-entry h3 { color: var(--ink); font-size: clamp(2rem, 3.2vw, 3.5rem); font-weight: 600; }
.echo-mini-entry h3 em { color: inherit; }
.echo-style-samples { gap: 8px; }
.echo-style-samples span { padding: 10px 12px; color: var(--ink-soft); border: 0 !important; border-radius: 12px; background: #f5f5f7; font-family: var(--sans); font-size: .9rem; }

.echo-compare-grid { grid-template-columns: .8fr 1.2fr; gap: 18px; }
.echo-compare-grid article,
.echo-compare-old,
.echo-compare-new {
  min-height: 560px;
  color: var(--ink);
  border: 0;
  border-radius: 28px;
  background: #fff;
  box-shadow: none;
  opacity: 1;
  transform: none;
}
.echo-compare-new { box-shadow: inset 0 0 0 2px rgba(0, 113, 227, .18); }
.echo-compare h3,
.echo-compare-new h3 { color: var(--ink); font-size: clamp(1.8rem, 2.8vw, 3rem); font-weight: 600; }
.echo-compare-new .echo-compare-label { color: #0066cc; }
.echo-compare-new li,
.echo-compare-new li strong { color: var(--ink); border-color: var(--line); }
.echo-compare-new li span { color: var(--ink-soft); }
.echo-compare-new li::before { color: #fff; background: #0071e3; }

.echo-intelligence-lede { color: var(--ink-soft); font-family: var(--sans); font-size: clamp(1.1rem, 1.6vw, 1.35rem); }
.echo-service-line { gap: 12px; }
.echo-service-line article { min-height: 240px; padding: 28px 22px; border: 0; border-radius: 22px; background: #fff; }
.echo-service-line article:not(:last-child)::after { display: none; }
.echo-service-line span { color: #0066cc; }
.echo-service-line h3 { font-size: 1.25rem; font-weight: 600; }
.echo-team-intro h3 { color: var(--ink); font-size: clamp(2rem, 3vw, 3.2rem); font-weight: 600; }
.echo-team-intro h3 em { color: inherit; }
.echo-team-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; }
.echo-team-member { padding: 28px; border-radius: 24px; background: #fff; }
.echo-team-avatar { width: 96px; margin-bottom: 24px; }
.echo-team-member h4 { font-size: 1.55rem; font-weight: 600; }
.echo-metrics { gap: 16px; }
.echo-metrics article,
.echo-metrics article:nth-child(3n+1),
.echo-metrics article:not(:nth-child(3n+1)) { min-height: 180px; padding: 28px; border: 0; border-radius: 22px; background: #fff; }
.echo-metrics strong { color: var(--ink); font-size: clamp(2.3rem, 3.5vw, 4rem); font-weight: 600; }
.echo-metrics span { margin-top: 16px; }

.echo-outcomes h2,
.echo-outcomes h3,
.echo-outcomes .echo-index { color: var(--ink); }
.echo-outcomes h2 em { color: inherit; }
.echo-outcome-grid { gap: 16px; border: 0; }
.echo-outcome,
.echo-outcome + .echo-outcome { min-height: 240px; padding: 30px; border: 0; border-radius: 22px; background: #fff; }
.echo-outcome h3 { margin: 52px 0 14px; font-size: clamp(1.35rem, 1.8vw, 1.75rem); }
.echo-outcome p { color: var(--ink-soft); }
.echo-photo-band { gap: 12px; border: 0; }
.echo-photo-band figure { min-height: 270px; border: 0; border-radius: 20px; }

.echo-path-grid { gap: 18px; border: 0; }
.echo-path,
.echo-path + .echo-path,
.echo-path-primary { min-height: 520px; color: var(--ink); border: 0; border-radius: 28px; background: #fff; }
.echo-path-primary { background: #eef6ff; }
.echo-path h3 { color: var(--ink); font-size: clamp(2rem, 3vw, 3.2rem); font-weight: 600; }
.echo-path p,
.echo-path-primary p,
.echo-path-primary li { color: var(--ink-soft); }

.plan-table { border: 0; border-radius: 26px; background: #fff; }
.plan-head { background: #f5f5f7; }
.plan-row > div { border-color: var(--line); }
.plan-row.featured { background: #eef6ff; }
.plan-row.featured > div:first-child { border-left-color: #0071e3; }
.echo-mini-entry-plan { margin: 14px clamp(8px, 1.2vw, 20px); }

.echo-faq-list { display: grid; gap: 10px; border: 0; }
.echo-faq details { padding: 0 26px; border: 0; border-radius: 18px; background: #fff; }
.echo-faq summary { font-family: var(--sans); font-size: 1.1rem; font-weight: 500; }
.echo-faq summary::after { color: #0066cc; }

.echo-footer { margin: 14px clamp(8px, 1.2vw, 20px); padding: 54px var(--pad-x); border: 0; border-radius: 28px; background: #f5f5f7; }
.echo-footer div strong { font-family: var(--sans); font-size: 1.35rem; font-weight: 600; }
.echo-mobile-cta { border-radius: 999px; background: #0071e3; }

@keyframes echo-ai-slide {
  from { opacity: 0; filter: blur(10px); transform: translateX(-32px); }
  to { opacity: 1; filter: blur(0); transform: translateX(0); }
}
@keyframes echo-comma-in {
  from { opacity: 0; transform: translateY(-.22em); }
  to { opacity: 1; transform: translateY(0); }
}
@keyframes echo-i-slide {
  from { opacity: 0; filter: blur(8px); transform: translateX(-.38em) scale(.92); }
  to { opacity: 1; filter: blur(0); transform: translateX(0) scale(1); }
}
@keyframes echo-light-breathe {
  0%, 100% { opacity: .54; transform: translate(-50%, -50%) scale(.96); }
  50% { opacity: .8; transform: translate(-50%, -50%) scale(1.02); }
}

@media (max-width: 1100px) {
  .scene-grid-tech { grid-template-columns: 1fr; }
  .scene-card-tech { grid-template-columns: minmax(220px, .6fr) 1fr; }
  .echo-service-line { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}

@media (max-width: 768px) {
  :root { --card-radius: 24px; }
  main > section,
  main > aside,
  .echo-footer,
  .echo-mini-entry-plan { margin: 8px; }
  .echo-header-tech { min-height: 60px; }
  .echo-hero-tech { min-height: calc(100svh - 76px); padding: 82px 20px 104px; }
  .echo-hero-tech .echo-formula { gap: 0; font-size: clamp(6.2rem, 29vw, 9rem); }
  .echo-tech-aura i { width: 118vw; }
  .echo-tech-aura i:nth-child(2) { width: 82vw; }
  .echo-tech-definition { max-width: 320px; font-size: 1.05rem; }
  .echo-tech-lede { max-width: 330px; font-size: .95rem; }
  .echo-scenes-tech { padding: 76px 18px; }
  .echo-scenes-intro { grid-template-columns: 1fr; gap: 20px; }
  .echo-scenes-intro h2,
  .echo-section-head h2,
  .echo-trust h2 { font-size: clamp(2.35rem, 10.5vw, 3.35rem); }
  .scene-card-tech { display: block; padding: 10px; border-radius: 22px; }
  .scene-card-tech img { aspect-ratio: 16 / 11; border-radius: 16px; }
  .scene-card-tech > div { padding: 24px 14px 28px; }
  .scene-card-tech h3 { font-size: 1.65rem; }
  .echo-story { grid-template-columns: 1fr; padding: 10px; }
  .echo-story-image { min-height: 52svh; border-radius: 18px; }
  .echo-story-copy { padding: 54px 14px; }
  .echo-section-head { grid-template-columns: 1fr; }
  .echo-voice-grid,
  .echo-compare-grid,
  .echo-team-grid,
  .echo-metrics,
  .echo-outcome-grid,
  .echo-path-grid { grid-template-columns: 1fr; }
  .echo-compare-grid article,
  .echo-compare-old,
  .echo-compare-new { min-height: auto; }
  .echo-team-member { display: grid; grid-template-columns: 76px 1fr; }
  .echo-team-avatar { width: 76px; }
  .echo-service-line { grid-template-columns: 1fr; }
  .echo-service-line article { min-height: 180px; }
  .echo-photo-band { grid-template-columns: 1fr 1fr; }
  .echo-path,
  .echo-path + .echo-path,
  .echo-path-primary { min-height: 480px; }
  .echo-qr-strip { padding: 54px 20px; }
}

@media (prefers-reduced-motion: reduce) {
  .echo-formula-ai,
  .echo-formula-equals,
  .echo-formula-i,
  .echo-tech-aura i { opacity: 1; filter: none; transform: none; animation: none; }
  .echo-tech-aura i { transform: translate(-50%, -50%); }
}

/* Warm daylight palette — quiet technology, human warmth */
:root {
  --paper: #fffefa;
  --paper-soft: #faf6ee;
  --ink: #2f2a25;
  --ink-soft: #70675f;
  --ink-mute: #968a7d;
  --terracotta: #c68420;
  --gold: #d7a84d;
  --olive: #faf6ee;
  --line: rgba(77, 58, 35, .09);
  --line-soft: rgba(77, 58, 35, .055);
  --sun: #dfa02d;
  --sun-deep: #a96712;
  --cream: #faf6ee;
  --cream-strong: #f4ead8;
  --cream-light: #fffaf0;
}
body { background: #fffefa; }
.echo-header-tech { background: rgba(255, 254, 250, .86); }
.echo-button,
.echo-header-tech .echo-button,
.echo-button-light {
  color: #352717;
  background: var(--sun);
  border-color: var(--sun);
}
.echo-button:hover,
.echo-header-tech .echo-button:hover,
.echo-button-light:hover { color: #2f2417; background: #e8ab39; }
.echo-text-link { color: var(--sun-deep); }

.echo-hero-tech {
  background:
    radial-gradient(circle at 70% 20%, rgba(244, 213, 151, .48), transparent 25%),
    radial-gradient(circle at 26% 82%, rgba(255, 235, 195, .58), transparent 29%),
    #faf6ee;
}
.echo-tech-aura i {
  background: rgba(255, 253, 247, .7);
  box-shadow: 0 30px 100px rgba(133, 91, 35, .08);
}
.echo-tech-aura i:nth-child(2) { background: rgba(255, 246, 225, .58); }
.echo-formula-ai { color: var(--ink); }
.echo-formula-equals { color: #aa9d8f; }
.echo-formula-i {
  position: relative;
  min-width: .82em;
  background: linear-gradient(145deg, #f2c463 4%, #dc9221 52%, #bd6825 100%);
  -webkit-background-clip: text;
  background-clip: text;
}
.echo-formula-i::after {
  content: '。';
  position: absolute;
  right: -.14em;
  bottom: .04em;
  color: #c57924;
  font-size: .28em;
  font-weight: 600;
  -webkit-text-fill-color: #c57924;
}
.echo-tech-cta { color: #8f5a11; background: rgba(255, 253, 248, .82); }
.echo-signal span { background: var(--sun); }
.echo-hero-footnote em { color: var(--sun-deep); }

.echo-scenes-tech,
.echo-questions,
.echo-voices,
.echo-compare,
.echo-intelligence,
.echo-outcomes,
.echo-paths,
.echo-plans,
.echo-faq,
.echo-qr-strip,
.echo-mini-entry-plan { background: var(--cream); }

.echo-scenes-intro h2 em,
.echo-section-head h2 em,
.echo-trust h2 em,
.echo-story-copy h2 em,
.echo-team-intro h3 em,
.echo-mini-entry h3 em { color: var(--sun-deep); -webkit-text-fill-color: currentColor; }
.echo-tech-label,
.echo-compare-new .echo-compare-label,
.echo-service-line span,
.echo-faq summary::after { color: var(--sun-deep); }

.scene-card-tech,
.echo-voice,
.echo-voice:first-child,
.echo-voice:last-child,
.echo-mini-entry,
.echo-compare-grid article,
.echo-compare-old,
.echo-compare-new,
.echo-service-line article,
.echo-team-member,
.echo-metrics article,
.echo-metrics article:nth-child(3n+1),
.echo-metrics article:not(:nth-child(3n+1)),
.echo-outcome,
.echo-outcome + .echo-outcome,
.echo-path,
.echo-path + .echo-path,
.plan-table,
.echo-faq details,
.echo-qr-placeholder { background: #fffefa; }
.scene-card-tech span { color: #9b6b28; }
.echo-style-samples span,
.plan-head { background: var(--cream-strong); }
.echo-compare-new { box-shadow: inset 0 0 0 2px rgba(211, 151, 49, .23); }
.echo-compare-new li::before { color: #352717; background: #efbd5d; }
.echo-path-primary,
.plan-row.featured { background: #fff1d7; }
.plan-row.featured > div:first-child { border-left-color: var(--sun); }
.echo-mobile-cta { color: #352717; background: var(--sun); }
.echo-footer { background: var(--cream); }

@media (max-width: 768px) {
  .echo-formula-i { min-width: .84em; }
}